What does it mean to be “terminated by a zero”?

Question

I am getting into C/C++ and a lot of terms are popping up unfamiliar to me. One of them is a variable or pointer that is terminated by a zero. What does it mean for a space

Answer 1

Arrays and string in C is just a pointers to a memory location. By pointer you can find a start of array. The end of array is undefined. The end of character array (which is the string) is zero-byte.

So, in memory string hello is written as:

68 65 6c 6c 6f 00                                 |hello|